6uhc

CryoEM structure of human Arp2/3 complex with bound NPFs

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Actin-related protein 3

Homo sapiens

UniProt P61158

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 2 × 1 (P61160) Actin-related protein 2/3 complex subunit 1B × 1 (O15143) Actin-related protein 2/3 complex subunit 2 × 1 (O15144) Actin-related protein 2/3 complex subunit 3 × 1 (O15145) Actin-related protein 2/3 complex subunit 4 × 1 (P59998) Actin-related protein 2/3 complex subunit 5 × 1 (O15511) Neural Wiskott-Aldrich syndrome protein × 2 (Q91YD9) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name ARP3_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–418; UniProt 1–418

Actin-related protein 2

Homo sapiens

UniProt P61160

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 3 × 1 (P61158) Actin-related protein 2/3 complex subunit 1B × 1 (O15143) Actin-related protein 2/3 complex subunit 2 × 1 (O15144) Actin-related protein 2/3 complex subunit 3 × 1 (O15145) Actin-related protein 2/3 complex subunit 4 × 1 (P59998) Actin-related protein 2/3 complex subunit 5 × 1 (O15511) Neural Wiskott-Aldrich syndrome protein × 2 (Q91YD9) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name ARP2_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–394; UniProt 1–394

Actin-related protein 2/3 complex subunit 1B

Homo sapiens

UniProt O15143

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 3 × 1 (P61158) Actin-related protein 2 × 1 (P61160) Actin-related protein 2/3 complex subunit 2 × 1 (O15144) Actin-related protein 2/3 complex subunit 3 × 1 (O15145) Actin-related protein 2/3 complex subunit 4 × 1 (P59998) Actin-related protein 2/3 complex subunit 5 × 1 (O15511) Neural Wiskott-Aldrich syndrome protein × 2 (Q91YD9) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name ARC1B_HUMAN
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C; PDBConstruct 1–372; UniProt 1–372

Actin-related protein 2/3 complex subunit 2

Homo sapiens

UniProt O15144

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 3 × 1 (P61158) Actin-related protein 2 × 1 (P61160) Actin-related protein 2/3 complex subunit 1B × 1 (O15143) Actin-related protein 2/3 complex subunit 3 × 1 (O15145) Actin-related protein 2/3 complex subunit 4 × 1 (P59998) Actin-related protein 2/3 complex subunit 5 × 1 (O15511) Neural Wiskott-Aldrich syndrome protein × 2 (Q91YD9) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name ARPC2_HUMAN
Isoform —
PDB entities 4
Chains and sequence ranges Author chain D; PDBConstruct 1–300; UniProt 1–300

Actin-related protein 2/3 complex subunit 3

Homo sapiens

UniProt O15145

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 3 × 1 (P61158) Actin-related protein 2 × 1 (P61160) Actin-related protein 2/3 complex subunit 1B × 1 (O15143) Actin-related protein 2/3 complex subunit 2 × 1 (O15144) Actin-related protein 2/3 complex subunit 4 × 1 (P59998) Actin-related protein 2/3 complex subunit 5 × 1 (O15511) Neural Wiskott-Aldrich syndrome protein × 2 (Q91YD9) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name ARPC3_HUMAN
Isoform —
PDB entities 5
Chains and sequence ranges Author chain E; PDBConstruct 1–178; UniProt 1–178

Actin-related protein 2/3 complex subunit 4

Homo sapiens

UniProt P59998

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 3 × 1 (P61158) Actin-related protein 2 × 1 (P61160) Actin-related protein 2/3 complex subunit 1B × 1 (O15143) Actin-related protein 2/3 complex subunit 2 × 1 (O15144) Actin-related protein 2/3 complex subunit 3 × 1 (O15145) Actin-related protein 2/3 complex subunit 5 × 1 (O15511) Neural Wiskott-Aldrich syndrome protein × 2 (Q91YD9) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name ARPC4_HUMAN
Isoform —
PDB entities 6
Chains and sequence ranges Author chain F; PDBConstruct 1–168; UniProt 1–168

Actin-related protein 2/3 complex subunit 5

Homo sapiens

UniProt O15511

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 3 × 1 (P61158) Actin-related protein 2 × 1 (P61160) Actin-related protein 2/3 complex subunit 1B × 1 (O15143) Actin-related protein 2/3 complex subunit 2 × 1 (O15144) Actin-related protein 2/3 complex subunit 3 × 1 (O15145) Actin-related protein 2/3 complex subunit 4 × 1 (P59998) Neural Wiskott-Aldrich syndrome protein × 2 (Q91YD9) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name ARPC5_HUMAN
Isoform —
PDB entities 7
Chains and sequence ranges Author chain G; PDBConstruct 1–151; UniProt 1–151

Neural Wiskott-Aldrich syndrome protein

Mus musculus

UniProt Q91YD9

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 9 Actin-related protein 3 × 1 (P61158) Actin-related protein 2 × 1 (P61160) Actin-related protein 2/3 complex subunit 1B × 1 (O15143) Actin-related protein 2/3 complex subunit 2 × 1 (O15144) Actin-related protein 2/3 complex subunit 3 × 1 (O15145) Actin-related protein 2/3 complex subunit 4 × 1 (P59998) Actin-related protein 2/3 complex subunit 5 × 1 (O15511) MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 2 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name WASL_MOUSE
Isoform —
PDB entities 8
Chains and sequence ranges Author chain H; PDBConstruct 1–501; UniProt 1–501 Author chain I; PDBConstruct 1–501; UniProt 1–501

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id6uhc
Deposition date deposition_date2019-09-27
Structure title titleCryoEM structure of human Arp2/3 complex with bound NPFs
Keywords keywordsactin, ATPase, actin related protein, arp, cytoskeleton, Arp2-3 complex, actin nucleation, actin branching, CONTRACTILE PROTEIN; CONTRACTILE PROTEIN
Experimental Method methodELECTRON MICROSCOPY
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

6uhc__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

6uhc__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

6uhc__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg(Guinier)45.04 Å
Rg (electron density)44.50 Å
Total Rg44.68 Å
Atom count14680
Residues1940
Excluded volume259800 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 6uhc__assembly_1__model_1 nonameric (9) Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (10)

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6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id6uhcA01
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily10 — ATPase, substrate binding domain, subdomain 4
Domain ID domain_id6uhcB01
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily10 — ATPase, substrate binding domain, subdomain 4
Domain ID domain_id6uhcC00
Class class2 — Mainly Beta
Architecture architecture130 — 7 Propeller
Topology topology10 — Methylamine Dehydrogenase; Chain H
Homologous superfamily homologous superfamily10 — YVTN repeat-like/Quinoprotein amine dehydrogenase
Domain ID domain_id6uhcD01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology1460 — Yope Regulator; Chain: A,
Homologous superfamily homologous superfamily20 —
Domain ID domain_id6uhcD02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology1460 — Yope Regulator; Chain: A,
Homologous superfamily homologous superfamily20 —
Domain ID domain_id6uhcE00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology1760 — Arp2/3 complex 21 kDa subunit ARPC3
Homologous superfamily homologous superfamily10 — Actin-related protein 2/3 complex subunit 3
Domain ID domain_id6uhcF00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology1460 — Yope Regulator; Chain: A,
Homologous superfamily homologous superfamily20 —
Domain ID domain_id6uhcG00
Class class1 — Mainly Alpha
Architecture architecture25 — Alpha Horseshoe
Topology topology40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily190 — Actin-related protein 2/3 complex subunit 5
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7. Citations (1)